/**
 * @author Roger Wu
 */
/* @cc_on _d=document;eval('var document=_d')@ */
/*
 * @cc_on eval((function(props) {var code = [];for (var i = 0,l = props.length;i<l;i++){var
 * prop =
 * props[i];window['_'+prop]=window[prop];code.push(prop+'=_'+prop);}return 'var
 * '+code.join(',');})('document self top parent alert setInterval clearInterval
 * setTimeout clearTimeout'.split(' ')))@
 */